Furnace.



H. N. LEASK.

FURNACE.

APPLICATION FILED SEPT. 9, 1907.

Patented J1me '7, 1910.

2 SHEETS-SHEET l.

INVENTOR H. N. LEASK.

FURNACE.

APPLICATION FILED SEPT. 9, 1907.

960,969, Patented June 7, 1910.

2 SHEETS-SHEET 2.

WITNESSES. 1 NVENTOR.

HENRY NORMAN LEASE, EGREMONT, ENG-LAND.

FURNACE.

Specification of Letters Patent.

Patented June '7, 1910.

Application filed September 9, 1907: Serial No. 392,003.

To all wl wm it may concern."

Be it known that I, HENRY NORMAN LEAsK,

British subject, and resident of E remont, county of Chester, England,have invented certain new and useful Improvements in Furnaces, of whichthe following is a specification.

This invention relates to furnaces of the type describedin thespecification" attached to my application for patent filed concurrentlywith the present application Serial Number 392,004 and in which afurnace constructed with a rising and falling grate is described and hasreference to a s ecial construction of furnace built accordlng to theinvention described in such concurrent application.

It consists essentiall of a furnace in which the whole or part of thesole table or hearth of the fire is constructed in such a manner that itcan be raised or lowered as desired and so that, when lowered, it can bedropped on to a truck or carriage to enable the hearth and its charge orcontents to be wholly removed from the furnace, and to enable adischarged or a freshly charged grate to be run into position and raisedinto the furnace. Such a construction permits of very easily and readilycharging or discharging or clinkering a furnace ofinserting orwithdrawing a billet or ingot, or a crucible or the like and of readilytransportin same to 1 any desired position, and is app icable to anyfurnace 1n which it may be found advantageous to so remove the hearth ora portion thereof.

The invention will be fully described with reference to the accompanyingdrawings.

Figure 1 is a transverse section through the furnace. Fig. 2 is asection on the line w:v, Fig. 1. Flg. 3 is a transverse section throughthe furnace shown provided with a charging chamber.

The upper part of the furnace or cell A is of any usual construction.The grate or hearth B is supported on a hydraulic or other ram 6 in sucha manner that it can be.

hollow boxes Q and b which constitute sideand end air supplying meansfor the grate when the latter is elevated, said boxes being suitablysecured to the walls of the cell and provided with perforations throughwhich the air supply for the furnace is passed. If desired these boxesmay be divided and steam or water as well as air may be passed into thefire.

The hollow boxes surrounding the grate as above noted are practicallycontinuous or provide an airsupplying rim with an inner wall slopingdownwardly and outwardly or sloping toward the bottom of the rim or boxso that the clinkers will fall away from the rim or box and'be carrieddownwardly with the grate as the latter is lowered.

The ram b for raising and lowerin the I grate preferably passes throughthe ame of the truck R and'when the grate B rests on the latter the ramis lowered still farther out of the way of the truck. The latter is thenmoved into the chamber H where the air supply for the furnace may bepassed over or through it to extract the heat from any clinker, or othercharge thereon it may be desired to cool. This form of grate may withgreat advanta e be applied to refuse destructors as the refuse can beburned thereon continually without the necessity of stopping the furnaceto clear the grate of clinker. As the refuse is burned thereon and theclinker is formed the grate is gradually lowered without anyinterference with the air supply which enters through the end boxes andside boxes 6 Q. If desired guides S may be provided to maintain thegrate in the proper position, as it is raised or lowered.

In one form of the invention a second inclosed chamber T (see Fig. 3).vmay be constructed in front of the lower portion of the either char edor uncharged may be in readiness to pus the hot grate and its heated orburned out charge into the chamber H, at the same time taking up aposition ready for be in raised into the fire.

This invention is specially applicable for furnaces in which billets oringots of metal are to be heated or in which metal or the like is to bemelted or for any other furnace in which it may be advantageous toremove the grate or a portion thereof. Any convenient means other than ahydrauhc ram may also be employed for raisln-g the grate into positionin the furnace and suitable me chamcalmeans may also be employed ifdesired to maintain the hearth in-the raised position.

It will be evident that the furnace has a combustion chamber providedwith a grate which is movable toward and from its operair box having afigred position in the fur-' nace a ainst which the grate is placed whenin norma position, a carrlagejocated below the normal osition of thegrate to receive the latter w en it is lowered, and means located belowthe carriage and movable upwardly through the latter to en age the gratefor placing and displacing t e latter.

2. The combination of a furnace Having a grate mounted for rising andfallin motion, a coolin chamber opening into tie lower art of t efurnace and outside, of the main rnace structure, a carriage movableinto and out of said coolin chamber and also under the place occupie bythe grate'when the latter 1s m normal position in the furnace, and meansfor raising and lowering scopes the grate and permitting grate to rest aposition over the ram, the ram being adapted to lower a grate onto saidcarriage or to elevate a grate from off the carria e into 0 erativerelation with the com ustion c amber.

4. The combination of a furnace having a combustion chamber providedwith a rismg and falling grate, a ram to raise and lower the said grate,a carriage movable to'a position over the ram, the ram being adapted tolower the grate onto saidcarriage or to elevate'the grate from ofi:' thecarria e into 0 erative relation with the com ustion c amber, andcooling and char ing chambers located at opposlte sides of t e space inwhich said ram is located.

' In witness whereof, I have hereunto signed my name in the presence oftwo subscribing witnesses.

HENRY NORMAN LEASK.

' Witnesses:

J. OwnnN'OBnmN, HARRY BARNFATrmR.

